Clicking or like cutting-out knife



H. H. FREER CLICKING OR LIKE CUTTING-OUT KNIFE Dec. 8, 1925- Filed Jan. 6, 1925 Patented Dec. 8, 1925.

UNITED STATES HENRY HOWARD FREER, 0F LEICESTER, ENGLAND.

CLICKING 0R LIKE CUTTING-OUT KNIFE.

Application filed January 6, 1925.

To all whom may concern:

Be it known that I, HENRY Hownni) FREER, a subject of the King of England, residing at Leicester, England, have invented certain new and useful Improvements in Clicking or like Cutting-Out Knives, of which the following is a specification.

This invention relates to clicking or like cutting-out knives for cutting leather, fabric, paper or the like into various shapes by means of a press, and concerns that type of built-up clicking or cutting-out knife comn-ising a strip of metal having one edge formed as a cutting-edge and bent to the shape required, and a backing-plate or the like to which the said metal strip is secured.

According to this invention the backingplate is constituted by a sheet metal blank with a bent edge, and the cutting-strip is secured to this edge, for example by riveting. Preferably the cutting-strip is secured to the inside of the said edge.

The edge may be constituted by a series of lugs either secured to, or integral with, the backing-plate so that the edge can be bent to conform to the curvature of the cutting-strip in certain patterns.

Other features of the invention will be hereinafter described and pointed out in the claims.

In the accompanying drawings:

Figure l is aperspective view of a clicking knife according to this invention.

Figure 2 is a plan of the baoking-plate prior to bending up the edge; and

Figure 3 is an enlarged sectional view of a portion of the knife.

Like reference numerals refer to like parts in the various figures.

In the specific construction shown in the drawings, the clicking knife comprises a backing-plate 4, preferably of a light metal, such as aluminum, having a bent edge 5 to which is secured, by rivets 6, the knife proper constituted by a strip of steel 7 having a cutting-edge 8.

For the backing-plate a metal blank stamped to the required shape is perforated all round at a convenient distance from the edge with a number of D-shaped perforations 9 whereof the fiat sides lie towards the centre of the blank and along lines which represent the outline of the shape to be cut. The metal of the blank outside these lines is then bent over to form the edge 5, and, in order to negotiate the curves in the pattern,

Serial No. 847.

the metal between the edge of the blank and certain perforations is cut through, as at I0, thus leaving a series of independent lugs 11. The cutter-strip '7, which may be about inch wide, is bent to shape on a mandrel and is secured to the inside of the edge 5, as shown, although, obviously, any other means of securing the strip may be employed. One or more holes 12 are provided in the backingplate for the purpose of accon'nnodating a plunger or the like for liberating the cut blanks of material.

The knife thus produced is very light and rigid and the cost of manufacture thereof is considerably less than the usual type of clicking knife made in one solid piece. The above construction is given by way of example only. Obviously, instead of the perforations, the edge of the plate can be slotted all round to constitute a series of lugs.

hat I claim as my invention and desire to secure by Letters Patent is:

l. A cutting-out knife of the kind described comprising in combination a sheetmetal backing-plate having a rim constituted by a turned-down edge thereof, a cuttingstrip and means securing said cutting strip to said rim.

2. A cutting-out knife of the kind described comprising in combination a sheetmetal backing-plate, and a cutting-strip bent to conform to the contour required and secured near one of its edges to said backingplate to stand at right angles to the general plane thereof with its cutting edge directed away from the said plate.

3. A cutting-out knife of the kind described comprising in combination a sheet metal backingplate, a rim on said backingplate substantially at right angles to the general plane thereof, and a cutting-strip secured to said rim.

4. A cutting-out knife of the kind described comprising in combination a sneetmetal backing-plate, a rim around the edge of said backing-plate and substantially at right angles to the general plane thereof, a cutting-strip and means securing said cutting strip to said rim.

5. A cutting-out knife of the kind described comprising in con'ibination a sheetmetal backing-plate having a rim around the edges thereof substantially at right angles to the general plane of the plate, and a cutting-strip secured to the inside of said rim to lie parallel therewith with one of its edges butting against said backing-1 plate.-

6. A cutting-oufiknife of the kind described comprising in combination a sheetmetal backing-plate having a rim constituted by a down-turnededge'of "the plate, and a cuttinp strip bent-to-the shapere-- quired riveted to said rim, substantially as set forth.

7. A cutting-out knife of the kind described con'iprising in combination a sheen metal ba'ckiiig plate having a rim "consti tuted by a plurality of lugs, secure'ctto said backingplat'e substantially at right anglesto the general plane otthe'plate, a ci'itting' strip and meanssecuringsaid cutting-strip to said lugs substantially as set forth scribed compiising'in combination a sheetmetal;birckingplat'e having a'rim' constitutedby a pluralit of lugs and acuttiug strip secured to the inside of said rim'i 9; A' cutting-out knife ofihef kind described comprising; in combination a backing-plate perforated along lines which rep resent the'contour of the'knife to be formed and having its'margii'ial portions turned down along: said lin'esto' constitute a l.'llil'," a cutting-strip and means securing" said cutting-strip to said rim sul" sta1itiallv as set fortln 10. A cutting-out knife" of the kind de'; scribed comprising in combination a sheet metal backing-plate perforatedalonglines which representthe contour of the knife to be formed and having its marginal portions" turned-down along said lines to constitute" a rim, and a cutting strip secured' to said rim at rigl'it angles to the generalplane of the plate, substantially as set'forth;

11. Acutting-out knife of the"kind described'comprising in combination a backing-plate having its edges slotted at i1iter'-' vals'to constitute a plurality of lugs which are turned down at right angles to the gen eral plane of the plate to constitute a rim, a cuttingstrip and meanssecuring said cut ting strip to said lugs, substantially. asset forth.

12. A cutting-out knife ofthe" kind de scribed comprising in combination 'a'' shaped metal blank perforated around 1t-s edge with a plurality of substantially Dehaped holes whereof tliefiatsides of the holes he along lines which represent the contour of the knife to be formed and having its marginal portions turned-down along said lines, a cutti-ng-strip and'aneans' securing said cuttingstrip to said marginal portions, substantially" as "set forth:

18. A cutting-out knife of the kind described con'iprising 'iir combination-a shaped metal blank perforated around its edge with a. plurality of substantiallyD-sliapedhole's' whereof the flat sides of the holes-lie'along line's which represent the} contour of the knife to be formed and having its marginal portions tiirneddown alongsaid lines, a cu'tting strip shaped to lie along said lines and' means" sec1iriiig sa'idcutting-strip to the" inside'="of said marginal portions,':sub stantially as set fo'rthfi 14:; Acutting' nt'-kiiife-of the kind-describ'e'd comprising iir combination a shapedmet al blank perforated around its edge with a plurality ofsubstantially' D-shaped holes whereof the' iiat sides of the'holes lie along lines which represent the contour' of the knife to be formedhavnig its edge slotted being' tl'uned down-' at right angles to the general plane of the plate; and a cutting strip bent to theshape"re'qnired secured" to ing a rim substanti ally," at right angles to the general plane of the plate, a"'-cutting strip and-means "securing said 'cr'itti'ng' strip to the inside of said rim, substantially as set forthi 7 In testimony \vh'er'eofiI afliimy signati'ire.

HENRY HOWARD 'FREER. 

